When a mixture of calcium hydroxide and ammonium chloride is heated, ammonia gas is made. calcium hydroxide + ammonium chloride $$\(\rightarrow\)$$ calcium chloride + water + ammonia Ammonia gas is soluble in water and toxic. Ammonia gas reacts with hot copper(II) oxide to make nitrogen. A student makes nitrogen using the apparatus shown in Fig. 1.1. Fig. 1.1 Explain why this experiment should be carried out in a fume cupboard. ................................................................................................................................................ . .......................................................................................................................................... $$\(\frac{Z}{0}\)$$ O O $$\(\circ\)$$

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